Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
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Optical investigation of high critical-current $Gd_{1+x}Ba_{2-x}Cu_3O_7$ coated conductors

  • Kim, G. (Department of Physics, Ewha Womans University) ;
  • Jo, W. (Department of Physics, Ewha Womans University) ;
  • Park, D.Y. (Department of Physics, Sogang University) ;
  • Cheong, H. (Department of Physics, Sogang University) ;
  • Shin, G.M. (Department of Materials Science and Engineering, Seoul National University) ;
  • Yoo, S.I. (Department of Materials Science and Engineering, Seoul National University)
  • Published : 2008.05.31
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Abstract

[ $Gd_{1+x}Ba_{2-x}Cu_3O_7$ ] (GdBCO) coated conductors on IBAD-MgO templates have grown by pulsed laser deposition. Critical current of the films were measured as about 90 A/cm by a four-probe method. The optical response of the films was investigated by Raman scattering spectroscopy. According to the Raman scattering spectra, the peaks at $328\;cm^{-1}$, $451\;cm^{-1}$, $504\;cm^{-1}$ were found and assigned to one $B_{1g}$ mode and two $A_{1g}$ modes, respectively. The high critical-current carrying behaviors of the GdBCO coated conductors are ascribed to their 123-structure without exchange of cation and incorporation of oxygen into the cuprates.

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References

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